Troy-Bilt String Trimmer Carburetor

This Craftsman carburetor is the component that mixes together gas and air before the mixture can reach the engine to power a lawn trimmer. If there isn’t enough fuel in the mix, it can damage the engine or cause the trimmer not to run. Too much fuel can create excess smoke, poor performance, or can prevent the engine from starting. Testing whether a carburetor needs to be replaced can be done by adding a small amount of fuel to the component after removing the air filter. If the engine begins to run but quickly sputters out, this is an indication that the carburetor has a problem. A replacement carburetor can be installed using a wrench, pliers, and safety glasses. This trimmer component is genuine OEM and comes directly from the manufacturer. It is compatible for use with lawn trimmers by Craftsman and MTD. This is an individual item that comes with the carburetor assembly and the carburetor gasket. Pliers and screwdrivers may be needed to complete this replacement or repair.

The primary function of a carburetor is to mix fuel and air in the right ratio. Fuel enters the carburetor through the fuel inlet fitting and then to the float bowl which delivers fuel to the other circuits. From there, the fuel goes to the needle valve, which is actuated by the float. When there is insufficient fuel, the float will stay down, keeping the valve open. Once the chamber has enough fuel, the float will go up and close the valve. A failed float bowl may leak or have too many dirt particles deposits that impede fuel flow. Luckily, you can easily replace a busted float bowl. This part is a genuine OEM Tecumseh 631867 float bowl replacement. You’ll have the assurance that this replacement is manufactured according to Tecumseh’s highest standards. It is compatible with mowers, tractors, and snowblowers from Toro, Cub Cadet, Lawn-Boy, MTD, and Tecumseh. This part is sold individually.